I have the answers to the questions, but I don't understand how to work it out, or what the answer actually means.
The system of equations
has infinitely many solutions. Describe this family of solutions and give the unique solution when .
The answers are:
(I don't know how to work out these solutions, or what it means)
and as such, when (This bit I do know how to work out, but I don't understand what it means)
Any help would be greatly appreciated!